John h



` the chair back wedges are driven to keep the Y in a socket in the screw 03.

UNTTED sTATEs PATENT OFFICE.

JOHN H. BELTER, OF NEW YORK, Y.

MACHINERY FOR SAWING ARABESQU CHAIRS.

speciacation of Letters! Patent No. 5,2os, ydated July 31, 1847.

To all whom t may con cern:

Be it known that I, JOHN H. BELTER, of the city of New York and the county and State of New York, have invented a newk and useful Machine for Cutting the Backs of Chairs, Sofas, &c., into Openwork; andl do hereby declare that the following is a full and exact description thereof, reference being had to the annexed dra-wings, making a part o-f this specification.

For the better understanding of the description it is necessary to state that the backs intended to be cut by the machine are made separately from the rest of the chair or sofa and are not attached to the other quart until they have been cut into open work.

Figure l of the drawings is a perspective view of the machine and Fig. 2 a vertical and longitudinal section of it through the center as it is when prepared for cutting a chair back.

A a strong platform of wood called for distinction the supporting platform ara slot in the platform to admit of its being moved in or out upon the frame C to which it is at tached. B a model fastened upon platform; the exterior edge has the curve R form of vthe interior of the chair -back at theY lowest part or where the back is attached to the seat of the chair. b, b, b, pieces around the edges of the platform between which and latter firm while the operation of sawing out the ligure is performed a frame consisting of one vertical and twolongitudinal pieces or rails, strongly tenoned together. The

Alower rail is attached to the supporting platform by a bolt o, which passes through the slot a in the platform and is secured by a washer and nut c". The upper rail is provided with an adjustable screw c3 the use of' which is to allow the piece D to be removed or replaced whenever it may be necessary. D an upright piece between the horizontal rails of the frame C having a slot d, in it extending nearly its whole length. The sides of the slot having grooves d in them which form guides for the block E. Atthe ends of this upright piece `are pivots 0 0 to admit of its turning around its longitudinal axis. The lower pivot rests in a socket in the end of the bolt c and the upper one E a block which serves as a guide to the saw: it has a hole through it provided with a bush e in which a rod f connected with the saw blade Vfreely slides. The block moves vertically in thev slot (E and has projections upon its sides which extend into the grooves d of the slot.-

F the saw blade. It is secured one endto the rod f passing through the block E and at the other endy to a rod f extending into the handle of the saw; part of this latter rod is squared and part hasa screw threadcut upon it the uses of which will be described hereafter. Each rod has a narrow slit or saw cut in it which receives the end of the blade and a pin is passed through both. At the commencement and sometimes during the process of cutting a back it is necessary to disconnect one end of thesaw blade` as will be seen when the operation of the machine comes to be described the pin that confV nects it with the rod f is therefore removableat pleasure. Gr a bow to keep the saw blade 1n line and give it stiffness. It has an eye at each end one of which receives the 1 others wood the parts L it are attached to'A Y each other and turn together and the partvla may .turn independently of the others? *i ywhen it 1s necessary. V'The metallic part h, Y passes through the eye of the bow andis j n secured on each side by a collar leaving it free to turn in the eye. In t-he interior of this part is a square socket which receivesV the square part of the rod f so that when the whole handle is turned the saw blade turns with it. has a socket that receives the part of the rod The part it" of the handle f" upon which a screw thread is cut and there is let into the handle a slot m throughv which the screw passes for the purpose of putting the necessary tension on the saw Y blade. The rod f has a collar n upon it which comes upon against the bow and keeps the blade from yielding when the handle is turned togive it tension; this colloo t lar is also used in connection with the handle to turn the blade the edge being milled that the thumb and finger may control it. a

The machine is fastened to the work bench by the lower rail of the frame C leaving the movable parts to be adjusted as the work It will be seen that thesaw may require.

blade has three diferentmotions besidesits motion for cutting viz., a motion around its longitudinal axis by means of the handle H and the rod f; a vertical motion by means Vilo of the block E and a vibrating motion around the aXis Vof the piece D by means of the points or pivots o, o. These motions enable the workmen to saw in any direction andto follow the lines of the pattern laid out upon the back of the chair or sofa however irregu.` lar or complicated the figure may be.

The manner of using the machine is as follows, let us suppose that a cha-ir back is to be cut; the back is placed in an upright position with lower edge upon the platform A and the curved side close against the Y, model B and wedges are driven between it and the projecting pieces b b b on the edge of the platform to hold it firmly. The pattern or design for the open work is marked out on the convex side of the back and a hole A f is made with a gimblet or center-bit in some arranged substantially as herein described.

J'. H. BELTER.

Witnesses: h

C. A. MAPEs, BENJN YATES. 

